Pumping rig



March 22 1927.

J. E. M c MB PUMPING RIG Filed March 21, 1925 Patented Mar. 22, 1927.

tenses JOHN E. MC'GG'MB, or nousriv'rtts, rnnnsrnvanm.

FULTPING BiIG.

. Application filed March 21 19,25;

Pilunping rigs have been provided with *allring beams and jacks which operate through the walking beam on the polished rod to actuate pumps or wells. The present invention is particularly designed to improve these features of a pumping rig.

The invention is illustrated in the accompanying drawings as follows Fig. 1 is a perspective view of a pumping rig.

Fig. 2 a section of the walking beam end on the line 2-2 in Fig. 1.

F 3 an enlarged side elevation of one of the pitman bearings.

Fig. i a section on the line 4% in Fig. 1.

1 marks the well tubing, 2 the polished rod, 3 the walking beam, and 4: the standing post.

The walking beam is formed of two lengths of pipe 5 and this extends into perforations 6 in the postend fitting 7 and they are locked in the perforations by set screws 7. The fitting has a central tapered open ing 8 through which a pin 9 extends into the post 1-. If a metal post is used trunnions 10 form the connection between the beam and the post. The front ends of the pipes are clamped between the front end fitting 11 formed in halves 12, each having the grooves 13 for receiving the pipes 5. The two halves are provided with ears 14- and 15 and clamping bolts 16 extend through these ears clamping the halves of the fittings together on the pipe. A slot 17 extends in wardly from the front ends of the fitting 11 and racks 18 are arranged along each side of the slot 17 both top and bottom.

A rocker block 19 is secured on the polished rod by a collar 20, the collar. being locked with the rod by set screws 21. The rocker block has teeth 19 which operate in the racks 18 so as to retain the rocker block in position on the walking beam. A jack bar 22 extends into a bearing block 23, this block having the toothed rocker surface 2 1 on which the lower pitman rocking block 25 rests, the rocker block having teeth extending into the rack. A pitman 26 extends from the block 25 to an upper block 27 similar to the block 25, the upper block having its teeth extending into the lower rack of the fitting 11. In the operation of the device the rock er blocks give a rocking action in the con-- nections between the beainand jack and between the beam and the polished rod. The teeth of the rocker block are slightly longer Serial No. 17,219.

than the teeth; of the bearing block, or the rack,- so that the crests of the teeth will ride in the surface at the bottom of the teeth in the bearing block or rack and the side Walls are so formed as to permit of a free rocking movement of the teeth relatively to each other, the only purpose of the teeth being to maintain the rocking surfaces in proper relation.

In order to more surely retain the pitman in place on the bearing block the bearing block is provided with an ear 29 which ex tends upwardly into a slot in the block 25; The ear has perforations 80.

A bolt 31 extends through the block 25 and the perforation, the perforation being sufficiently lar er than the bolt to be out of contact with the bolt in the normal operation of the device.

lVhat I claim as new is v 1. In a pumping rig, the combination of a reciprocating actuating member; an actuated member; a joint between said members comprising toothed thrust surfaces having a rolling contact; and a pin normally out of contact supplementing the teeth in maintaining the relation of the surfaces.

2. In a pumping rig, the combination of a walking beam formed of rods; a beam end fitting secured to the rods and slotted from the end inwardly; a pitman; a pitman connection between the beam and pitman; and a polished rod connection on the beam adapted to support a polished rod extending through the slot.

3. In a pumping rig, the combination of a. walking beam formed of rods; a beam end fitting secured to the rods and slotted from the end inwardly; a pitman; a pitman connection between the beam and pitman; and a polished rod connection on the beam adapted to support a polished rod extending through the slot, said connections comprising rolling contact surfaces.

4. In a pumping rig, the combination of a walking beam formed of rods; a beam end fitting secured to the rods and slotted from the end inwardly; a pitman; a pitman con-- nection between the beam and pitman: and a polished rod connection on the beam adapted to support a polished rod extending through the slot, said connections compris ing toothed rolling contact surfaces.

5. In a pumping rig, the combination of a walking beam formed of rods; a beam end fitting secured to the rods and slotted from the end inwardly; a pitman; a pitman con nection between the beam and pitman; and a polished rod connection on the beam adapted to support a polished rod extending through the slot, said polished rod connection comprising toothed rolling contact surfaces.

6. In a pumping rig, the combination of a walking beam formed of rods; a two-part fitting on the free end of the rods clamping the rods between the parts, said fitting being provided with a slot extending inwardly from its free end and having racks each side of the slot; a pitman; and polished rod connections having rocker blocks operating in said racks.

7. In a pumping rig, the combination of a walking beam formed of two rods; a fitting at the standing post end to which the rods are secured; a post connection on the fitting; a fitting at the free ends of the rods securing the rods at the free end; a polished rod; and pitman connections on the free end fitting.

In testimony whereof I have hereunto set my hand.

JOHN E. MCCOMB. 

